In mountainous areas, the level of farmers' farming is low, especially in fertilization, there are many misunderstandings, and the phenomenon of inappropriate fertilization is likely to occur, resulting in poor fertilizer efficiency, slow effect, and even plant death. Therefore, in the fertilization process, the following issues should be noted: First, misunderstanding one: When fertilizing? Near the stem of the plant, the fertilizer is easily absorbed. This is a phenomenon that exists in rural areas. This method of fertilization has great harm. Because the part of the plant that absorbs nutrients is in the root hair zone, the plant stems and roots (except for the root hair zone) absorb little or no nutrients, and when fertilizing? Near the plant stem (except for the seedling stage), the fertilizer is removed from the plant nutrient absorption site? Far, it is not easy to be absorbed. If too much fertilizer is applied and the concentration is too large, the phenomenon of “burning seedlings†occurs easily. Therefore, fertilization should be based on the growth of the plant's aboveground and underground root growth conditions to determine the location of fertilization to ensure the effect of fertilization. Second, misunderstanding 2: After crops appear to lack of fertilizer, re-fertilize After the fertilizer is applied, it takes 3-5 days before the paddy field can be absorbed and utilized by crops. It usually takes 5-7 days to be absorbed and utilized in the dry land. Therefore, after fertilization of crops occurs after fertilization, it will cause the crop to lose fertilizer for a long time. As a result, production is reduced. Therefore, fertilization should be based on the characteristics of crops that need fertilizer. Paddy fields should be fertilized 5-7 days in advance, and dry land should be fertilized 8-10 days in advance. At the same time, the nutrient absorption of crops is also related to light, temperature, water, and fertilization methods (such as dry application, infiltration application, top dressing, etc.). Strong light, high temperature, and high moisture content accelerate the absorption of crop nutrients. On the contrary, absorption slows down. Fertilizers outside the roots are directly absorbed by the leaves due to nutrients. Therefore, they are effective and can be applied late, but the concentration should be low to prevent damage to the leaves. The application of fertilizer can directly infiltrate the roots of the fertilizer, and the effect is quicker, and it can also be applied later. The dry fertilizer application effect is slow and should be applied early. Misunderstanding 3: As long as crops grow well, they can get high yields. The growth of crops includes two stages of vegetative growth and reproductive growth (except leafy vegetables and meat stem crops). The application of sufficient nitrogen fertilizer in the early growth stage can promote vegetative growth. However, if nitrogen fertilizer is applied in the reproductive growth stage, it will cause crop greediness, affect reproductive growth, hinder the transformation of nutrient substances, and instead reduce the yield and quality. Therefore, fertilization should be carried out according to crop growth conditions. Nitrogen fertilizers should be used in the early stage to promote vegetative growth, and nitrogen, phosphorus and potassium should be used in combination in the middle and later stages to promote reproductive growth and increase yield. Misunderstanding 4: As long as enough fertilizer is applied, high yield can be obtained. The types and amounts of nutrients needed for the various crops throughout the growing period and at different growth stages are different. If fertilization is not carried out according to the fertilizer requirement of the crop, first, the crop suffers from deficiency of nutrients, resistance to stress, and disease resistance, resulting in reduced yield and quality. Second, the requirement for some crops is small or almost not absorbed. The residual or loss of nutrients causes fertilizer waste. Therefore, the type and amount of fertilization should be determined according to the growth characteristics of the plant, and the fertilizer effect should be fully utilized. V. Myth 5: As long as fertilizer is applied, there will be fertilizer effect. Fertilizer efficiency is related to soil characteristics, crop nutrient absorption characteristics, fertilizer nutrient release characteristics, and water, gas, and heat conditions. If the effects of various factors are not fully considered, nutrient loss and lack of fertilizer can easily occur. . Sandy soil fertility is fast, but the loss is also fast. Therefore, it should be carried out according to the principle of less application and multiple application. The clay loam fertilizer has a slower effect and should be used as a base fertilizer to apply early fertilizer. Potassium fertilizer has good solubility, but the loss is also fast. Therefore, timely fertilization should be based on the potassium requirement of crops. Organic and phosphate fertilizers have slower efficiency and less loss. They should be applied early. Ammonium hydroxide has a high volatility and can be combined with organic fertilizers or phosphate fertilizers. Fertilization after 1-2 days can reduce the loss of nutrients. Sixth, misunderstanding six: only pay attention to the amount of fertilizer, do not pay attention to nutrient content Some compound fertilizers appearing in the market today are widely used in rural areas due to their low unit prices. These compound fertilizers generally have a low content of active ingredients or low or no elemental content of any of the three major elements. However, farmers do not pay enough attention to these conditions and continue to fertilize high-concentration compound fertilizers, resulting in the application of nitrogen. Insufficient phosphorus, potassium, resulting in crops lack of fertilizer, lack of disease occurrence, affecting yield and quality. Therefore, when these compound fertilizers are used, the contents of nitrogen, phosphorus and potassium in these compound fertilizers should be fully understood. According to the characteristics of various crops requiring fertilizers, combined use of element fertilizers such as nitrogen, phosphorus, and potassium can ensure the normal growth of crops. VII Misunderstanding 7: Fertilization? According to the principle of diminishing returns, when the fertilization reaches a certain amount, the input-output ratio decreases, and the benefit decreases. If you fertilize too much, you will lose production. Therefore, according to the characteristics of fertilizer requirement, soil fertility, crop planting density, etc. during the whole crop growth period, with the principle of adequate supply but no waste, find the best fertilization program for fertilization, give full play to the fertilizer effect, and increase economic efficiency. VIII Misunderstanding 8: Only pay attention to a large number of elements and do not pay attention to the application of trace elements. A large number of elements are the basic elements that crops rely on to grow, but some crops require more or less trace elements for the entire growth period or a certain growth period. If no trace elements are added, plants will be deformed. Falling fruit, product output and quality decline. Therefore, while applying a large amount of nitrogen, phosphorus, potassium and other elements, it is necessary to apply various trace elements such as iron, manganese, zinc, and boron to ensure the normal growth of crops in light of the characteristics of the crop's fertilizer requirements and soil nutrient composition. .
Sweeteners are food Additives that give soft drinks sweet taste. Sweeteners can be divided into nutritive sweeteners and non-nutritive sweeteners according to their nutritional value, low sweetness sweeteners and high sweetness sweeteners according to their sweetness, and natural sweeteners and synthetic sweeteners according to their sources. The sweeteners produced and sold by our company have the characteristics of high safety, good taste, high stability, good water solubility and reasonable price.
The main function of sweeteners
The main role of sweeteners in food:
(1) Palate: Sweetness is one of the indicators of many foods, in order to make food and beverage have a palatable feeling, it is necessary to add a certain amount of sweetener.
(2) The regulation and enhancement of flavor, generally need sweet in pastries; in beverages, the adjustment of flavor has a "sugar-acid ratio" item. Sweeteners can make the product get good flavor and retain fresh taste.
(3) The formation of flavor, sweetness and the flavor of many foods are complementary, many products taste is produced by the combination of flavor substances and sweeteners, so many foods are added sweeteners.
There are many kinds of sweeteners, which can be divided into natural sweeteners and synthetic sweeteners according to their sources, nutritive sweeteners and non-nutritive sweeteners according to their nutritional value, and sugar and non-sugar sweeteners according to their chemical structure and properties.
Glucose, fructose, sucrose, maltose, starch sugar and lactose are natural sweeteners, but because they have long been eaten by people and are important nutrients, they are usually regarded as food raw materials and are not used as food additives in China.
Non sugar sweeteners are natural sweeteners and synthetic sweeteners. Natural sweeteners include stevia, licorice, Disodium Glycyrrhetate, three potassium glycyrrhizinate and three sodium. Synthetic sweeteners include saccharin, saccharin sodium, sodium cyclohexylaminosulfonate, aspartate phenylalanine methyl ester alitame, etc.
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